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Texas Instruments MSP430FR50431IPMR
- Part No.:
- MSP430FR50431IPMR
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MSP430FR50431IPMR.pdf
- Description:
- IC MCU 16BIT 64KB FRAM 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,169
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Product details
Overview
MSP430FR50431IPMR from Texas Instruments is an ultrasonic sensing microcontroller (MCU) optimized for battery-powered smart water and gas meters. It integrates a 16-MHz RISC CPU, 64KB FRAM, 12KB RAM, 12-bit 8-MSPS sigma-delta ADC (SDHS), programmable gain amplifier (PGA), and dedicated Ultrasonic Sensing Solution (USS_A) subsystem with PPG and PHY. It achieves ±12.5-ps dToF accuracy for water flow and supports pipe diameters from 15 mm to 1000 mm.
For engineers reviewing the MSP430FR50431IPMR datasheet, MSP430FR50431IPMR pinout, MSP430FR50431IPMR application, or MSP430FR50431IPMR equivalent, key selection criteria include differential time-of-flight resolution (<5 ps), ultra-low active current (120 µA/MHz), LPM3.5 RTC standby (450 nA), integrated metering test interface (MTIF), and I²C bootloader capability.
Technical Context
The MSP430FR50431IPMR implements a tightly coupled ultrasonic sensing architecture: the USS_A module combines a programmable pulse generator (PPG), low-impedance 4-Ω PHY driver, PGA (–6.5 dB to 30.8 dB), and high-speed SDHS ADC to digitize echo signals with up to 8 Msps sampling. Its LEA subsystem offloads FFT-based signal processing independently of the CPU, enabling 256-point complex FFT up to 40× faster than a Cortex-M0+ core.
It operates across 1.8 V–3.6 V, supports multiple clock sources (DCO, LFXT, HFXT), and features dual-domain power management-separate analog (AVCC/AVSS), digital (DVCC/DVSS), and ultrasonic (PVCC/PVSS) supplies-with LPM4.5 shutdown at 30 nA. The device uses I²C as its factory-configured bootloader interface (BSL), distinguishing it from UART-BSL variants in the same family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 16-bit RISC CPUXV2, up to 16 MHz - enables deterministic real-time ultrasonic timing control and low-latency interrupt response. |
| FRAM Capacity | 64 KB nonvolatile memory - supports unified code/data/storage space with 10¹⁵ write endurance and 125 ns/word write speed. |
| USS_A Subsystem | Integrated PPG, 4-Ω PHY, PGA, and 12-bit 8-MSPS SDHS ADC - eliminates external transducer drivers and high-speed ADCs, reducing BOM count. |
| Time-of-Flight Accuracy | ±12.5 ps (water), ±250 ps (gas) - enables ±1% flow measurement accuracy across 500:1 dynamic range for water and 200:1 for gas. |
| Low-Power Modes | LPM3.5 (RTC active): 450 nA; LPM4.5 (shutdown): 30 nA - sustains 10+ year battery life in AMI metering applications. |
| Bootloader Interface | I²C-based BSL (not UART) - simplifies secure firmware updates via standard two-wire interface without additional UART level-shifting circuitry. |
| Analog Inputs | 7 external + 2 internal ADC channels - supports simultaneous acquisition of transducer echoes, temperature, and supply monitoring. |
Pinout & Package
LQFP-64 package (10 mm × 10 mm), thermally enhanced with exposed thermal pad; pin-compatible with MSP430FR5043IPM and MSP430FR50431IPM per TI's Device Comparison table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0_IN / CH1_IN | Ultrasonic transducer receive input | Differential analog inputs to USS_A PGA/ADC path; support direct connection to industry-standard 2.5 MHz transducers. |
| CH0_OUT / CH1_OUT | Ultrasonic transducer drive output | Low-impedance outputs from USS_A PHY; deliver clean excitation pulses with minimal zero-flow drift (ZFD). |
| USSXTIN / USSXTOUT | Ultrasonic crystal interface | Connects to optional 2.5 MHz ultrasonic reference crystal for precise timebase synchronization during dToF measurement. |
| PVCC / PVSS | Dedicated ultrasonic power domain | Isolates high-current USS_A switching noise from analog/digital domains, improving SNR and measurement repeatability. |
| MTIF_PIN_EN / MTIF_OUT_IN | Metering test interface control | Enables hardware pulse generation/counting (up to 1024 p/s) in LPM3.5 at 200 nA - supports metrology certification testing without CPU wake-up. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrasonic Sensing Solution (USS_A) | Full analog front-end (PPG + PHY + PGA + SDHS) integrated on-die - reduces external component count by ≥12 parts vs discrete solutions. |
| Low-Energy Accelerator (LEA) | Hardware FFT engine sharing 8 KB RAM with CPU - accelerates echo processing while CPU remains in LPM3, cutting system-level energy by ~35%. |
| Ferroelectric RAM (FRAM) | 64 KB unified memory with 125 ns write speed and 10¹⁵ endurance - enables frequent logging of flow events and diagnostics without flash wear-out concerns. |
| Metering Test Interface (MTIF) | Independent 16-bit pulse counter/generator operating in LPM3.5 at 200 nA - satisfies OIML R49 and EN 14236 pulse-output compliance requirements. |
| Security Architecture | AES-256 coprocessor + IP encapsulation + FRAM inherent tamper resistance - protects firmware and metrology algorithms against physical and logical attacks. |
Applications
| Ultrasonic Smart Water Meter | Ultrasonic Smart Gas Meter |
|---|---|
Use Scenario: Residential and commercial water meters measuring flow rates from <1 L/h to 8800 L/h across 15–250 mm pipes. IC Role / Device Role / Timing Role: Primary metrology SoC performing dToF calculation, temperature compensation, and pulse output via MTIF. Use Value: Achieves ±1% accuracy over 500:1 dynamic range with <5 ps time resolution, meeting ISO 4064 Class 2 requirements without external calibration. | Use Scenario: Industrial gas meters for natural gas distribution, measuring >25,000 L/h at pressures up to 10 bar. IC Role / Device Role / Timing Role: Core sensing controller executing multi-path dToF, pressure/temperature fusion, and EN 1434-compliant data logging. Use Value: Delivers ±1% accuracy up to 12,000 L/h with 200:1 range and complies with EN 14236 leakage detection thresholds. |
| Ultrasonic Heat Meter | Flow Transmitter (4–20 mA) |
Use Scenario: District heating systems requiring simultaneous forward/reverse flow and ΔT measurement for thermal energy calculation. IC Role / Device Role / Timing Role: Dual-channel ultrasonic processor acquiring paired dToF values and integrating RTD/thermistor readings via ADC12_B. Use Value: Enables sub-1% thermal energy accuracy using on-chip 12-bit ADC with window comparator and internal reference - no external precision ADC needed. | Use Scenario: Industrial process control where raw flow data must be converted to standardized 4–20 mA analog output. IC Role / Device Role / Timing Role: Intelligent transmitter MCU handling sensor excitation, dToF computation, linearization, and DAC-driven current loop control. Use Value: Integrates 12-bit DAC functionality via GPIO-controlled PWM + RC filter (supported by TA0/TA1 timers), eliminating external DAC ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrasonic sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSP430FR5043IPMR | UART bootloader (BSL), no LCD driver, identical USS_A/LEA/FRAM specs | Preferred when UART-based field updates are required; lacks I²C BSL security handshake features | Select for legacy toolchain compatibility or where UART debug access is mandatory during production programming. |
| MSP430FR50431IRGCR | VQFN-64 (9 mm × 9 mm) instead of LQFP-64; identical electrical specs and pin mapping | Better suited for space-constrained PCB layouts; requires different reflow profile and inspection criteria | Select for compact meter designs where board area is constrained and thermal pad soldering is feasible. |
Compared with MSP430FR5043IPMR and MSP430FR50431IRGCR, the MSP430FR50431IPMR provides I²C-based secure bootloading and LQFP packaging optimized for manual rework and optical inspection in meter manufacturing - critical for metrology-grade production traceability.
Availability
MSP430FR50431IPMR is available at Aetrix Electronics and suitable for ultrasonic water metering, smart gas metering, and heat metering applications requiring stable component supply, long-term lifecycle assurance, and metrology-grade validation support.
Supply support for MSP430FR50431IPMR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with deep expertise in ultra-low-power design and metrology-grade signal chains.
The MSP430FR504x product line targets battery-operated utility meters, integrating ultrasonic sensing, FRAM, and LEA to eliminate external components while meeting ISO 4064, EN 14236, and OIML R49 standards.
FAQ
What is the primary function of the USS_A module in the MSP430FR50431IPMR?
The USS_A module in the MSP430FR50431IPMR is a fully integrated ultrasonic sensing analog front end comprising a programmable pulse generator (PPG), 4-Ω PHY driver, programmable gain amplifier (PGA), and 12-bit 8-MSPS sigma-delta ADC. It enables direct interfacing with standard 2.5 MHz ultrasonic transducers and delivers ±12.5-ps differential time-of-flight (dToF) accuracy for water flow measurement - a core capability required for ISO 4064 Class 2 compliance. This integration eliminates the need for external drivers, amplifiers, and high-speed ADCs in ultrasonic meter designs.
Does the MSP430FR50431IPMR support both water and gas flow measurement?
Yes, the MSP430FR50431IPMR supports both water and gas flow measurement through its configurable USS_A subsystem. For water, it achieves ±12.5-ps dToF accuracy and ±1% measurement accuracy across a 500:1 dynamic range. For gas, it delivers ±250-ps dToF accuracy and ±1% accuracy up to 12,000 L/h with a 200:1 range. The device meets ISO 4064, OIML R49, EN 14236, and EN 1434 standards for both media, and its programmable PPG and PGA allow optimization for differing acoustic impedances and signal amplitudes between liquid and gaseous environments.
What distinguishes the MSP430FR50431IPMR from the MSP430FR5043IPMR?
The MSP430FR50431IPMR differs from the MSP430FR5043IPMR primarily in its bootloader interface: MSP430FR50431IPMR uses an I²C-based hardware bootloader (BSL), while MSP430FR5043IPMR uses UART. Both share identical USS_A, LEA, FRAM, and low-power specifications. The I²C BSL in MSP430FR50431IPMR enables secure, two-wire firmware updates compatible with existing I²C infrastructure and supports stronger authentication protocols - making it preferred for deployments requiring enhanced update security and reduced pin count.
How does the Low-Energy Accelerator (LEA) improve ultrasonic signal processing in the MSP430FR50431IPMR?
The Low-Energy Accelerator (LEA) in the MSP430FR50431IPMR is a dedicated signal-processing engine that executes FFT, FIR, and matrix operations independently of the CPU. It shares 8 KB of RAM with the main CPU and performs a 256-point complex FFT up to 40× faster than the 16-MHz CPU alone. This offloading allows the CPU to remain in LPM3.5 (450 nA) during echo processing, reducing total system energy consumption by ~35% compared to CPU-only execution - a critical advantage for 10+ year battery life in AMI meters.
What package type and pin count does the MSP430FR50431IPMR use?
The MSP430FR50431IPMR uses a 64-pin LQFP package (code "PM") with 10 mm × 10 mm body size and exposed thermal pad. It is pin-for-pin compatible with other MSP430FR504x devices in the PM package variant, including MSP430FR5043IPMR and MSP430FR5041IPMR. Pin functions are documented in Section 7.2 of the SLASEF5B datasheet, with dedicated ultrasonic terminals (CH0_IN, CH0_OUT, USSXTIN, etc.) assigned to pins 53–63 for optimal signal integrity and noise isolation.
MSP430FR50431IPMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- MSP430™ FRAM
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- MSP430 CPUXV2
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- IrDA, SCI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 44
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FRAM
- EEPROM Size:
- -
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 9x12b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MSP430FR50431IPMR FAQ
1.How can I place an order for MSP430FR50431IPMR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSP430FR50431IPMR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MSP430FR50431IPMR reliable?
The price and inventory of MSP430FR50431IPMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSP430FR50431IPMR is usually 5 days.
3.What payment methods are accepted for MSP430FR50431IPMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSP430FR50431IPMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSP430FR50431IPMR?
MSP430FR50431IPMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSP430FR50431IPMR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MSP430FR50431IPMR?
For technical support, including MSP430FR50431IPMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSP430FR50431IPMR requirements.
6.How does Aetrix verify that MSP430FR50431IPMR is sourced from the original manufacturer or authorized distributors?
All MSP430FR50431IPMR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430FR50431IPMR meets industry standards.
7.What is the process for return or replacement of MSP430FR50431IPMR?
All MSP430FR50431IPMR units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR50431IPMR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MSP430FR50431IPMR part is unused and in its original packaging.
Return procedure for MSP430FR50431IPMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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